A Sack Standoff in the Checkout Aisle

By

Carl Bialik

September 24, 2011

The plastic bags shoppers use to carry their goods home from the store have become an environmental battleground, and statistics are a key weapon in the fight.

Cities around the U.S. have banned or considered banning the bags because of their environmental impact. Manufacturers of the sacks have dueled with environmentalists and makers of reusable bags over carbon footprints. And last week, a maker of reusable bags settled a lawsuit filed by a plastic-bag manufacturer over competing numerical claims on bags' imprint on the...